Lighting fixture



Oct. 12, 1937. A. H. WHITE LIGHTING FIXTURE Filed May 16, 1936 (I ttomeg 'nNi'r-s n s TATE.

Patented Oct. 12, 1937 7 s PATENT OFFl CE LIGHTING FIXTURE Arthur H. White, Cherrydale, va.

Application May 16, 1936, Serial No. 80,171

2 Claims.

the range and intensity of reflected light may be varied.

Another object of the invention is to provide in a lighting unit a reflector of such design that the light reflected to ,the ceiling and walls has a square or rectangular outline.

Another object of the invention is to control the light lines of the light reflected. I

Stillanother object of the invention is to provide a closed lighting unit in which the light intensity is not lowered.

Referring to the drawing. V

Fig. 1 is a sectional view of the lighting unit showing its severalparts in position.

Fig. 2 is a top plan View of the unit with the lens removed. f"

Figs. 3 and 4 are views in perspective of'the preferred form of light adjusting elements.

Fig. 5 is a view partly in perspective and partly in section of a spring member for holding the parts in position. 7

Referring in detail to the drawing the fixture comprises a lamp body ill which is substantially of U shape in cross section. The various parts of the lighting unit are held compactly within the lamp body and its upper end is open'for the passage of light. The lamp body in use is suspended from a ceiling and the light directed towards the ceiling through its openend.

At the base of the lamp body is provided a suitable arrangement for adjustably mounting a light bulb. .In its preferred form the adjusting means comprises a bracket ll formed of flat sheet material, shown in detail in Fig. 4, having a depressed portion IE which seats a standard light bulb I in a socket 93'. The bracket H is provided at its outer ends with 'down turned flanges l5 having apertures'therein.

Located Voneither side of the bracket H and adapted to cooperate therewith are similar L shaped brackets 18 shown in detail at Fig. 3. These brackets are formed with flanges l4 and [8 preferably downturned which are adapted to fit the contour of the lamp body near its base and be held in position between the main bracket and the lamp body. One arm of the L shaped bracket is slotted for the greater part of its length and these slots -l9 cooperate with the 'apertured flanges of the main bracket for adjusting the position of the main bracket relative to the lamp body. Suitable nut and bolt connections 20 may be provided for adjustably holding the several brackets in adjusted position.

Located directly above the brackets I6 and adapted to rest thereon is provided a reflector 2| made up of four similarly shaped reflecting plates 22. These plates are welded or held together in any suitable manner to form a reflector of frusto pyramidal shape. The square inner end of the reflector is adapted to seat on the bracket I6 and the square outer end protrudes slightly above the upper edge of the lamp body so as to eliminate any interference of the lamp body with the reflected rays. The reflector 2| may be fixed in position to the lamp body by suitable bolts 23.

Located within the main reflector" 2| I have provided an intensifying reflecting plate 24 which preferably is concave in shape. This reflector is located adjacent the bracket I land near the base end ofthe reflector 2i and is provided with an aperture 25 through which the neck end of a bulb may pass to be received by the socket l3. Radiating from the margin of the aperture are a series of slots 26 which give to the reflector a spring grip by which the reflector is held in position on the light bulb.

The endless spring member 21 shown in detail in Fig. 5 is of substantial V shape in cross section and is adapted to fit between the upper edge of the lamp body and the upper edge of the reflector 2 l One side 39 of the spring member fits tightly against the inside of the lamp body while the 7 other edge 29 will lie substantially in a horizontal position forming with the upper edge of the lamp body a shelf, which is adapted to receive a clear glass lens so as to keep the lighting unit dust proof. With such an arrangement no fastening devices are necessary to keep the lens in position.

From'the foregoing description it will be seen that I have provided a compact lighting unit which is easily installed and which is adapted to reflect light whose outline is straight lines and wherein the light bulb may be adjusted to vary the extent of the outline of the reflected light.

7 In installing the above described unit in a room to be 1ighted,the lamp body is first suspended from the ceiling and the proper light intensity and range determined by varying the distance of the light bulb and intensifying reflector relative to the top of the frusto pyramidal reflector. The outline of light reflected will be of straight line form. Several such units may be positioned from the ceiling so that the total surface of the ceiling may be lighted without having any of the light overlapping.

Having described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the following claims.

I claim:

1. A fixture for indirect lighting comprising a lamp casing having one end open for the passage of light, a light bulb bracket located within the casing, angle brackets associated therewith and provided with means adapted to permit adjustment of said light bulb bracket, a frusto pyramidal reflector disposed within the casing and having its lower edges resting on said angle brackets and its upper edges lying adjacent the upper edges of the casing, a spring ring disposed between said reflector and casing edges and a convex lens closing the casing and having its edge resting on said ring.

2. A fixture for indirect lighting comprising a lamp casing having one end open for the passage of light, a light bulb bracket located Within the casing, angle brackets associated therewith, and provided with means adapted to permit adjustment of said light bulb bracket, a frusto pyramidal reflector disposed within the casing and having its lower edges resting on said angle brackets, a concave reflector disposed above said brackets and having an opening through which the screw end of a light bulb may pass to be received by said light bulb bracket, said reflectors cooperating to direct the light to the ceiling in a straight lined outline.

ARTHUR H. WHITE. 

